+

US20060078402A1 - Fastener - Google Patents

Fastener Download PDF

Info

Publication number
US20060078402A1
US20060078402A1 US11/093,175 US9317505A US2006078402A1 US 20060078402 A1 US20060078402 A1 US 20060078402A1 US 9317505 A US9317505 A US 9317505A US 2006078402 A1 US2006078402 A1 US 2006078402A1
Authority
US
United States
Prior art keywords
fastener
threaded
parent material
knurled surface
threaded insert
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/093,175
Inventor
Timothy Barnsdale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tappex Thread Inserts Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB0407778.0A external-priority patent/GB0407778D0/en
Priority claimed from US10/927,208 external-priority patent/US7203989B2/en
Application filed by Individual filed Critical Individual
Priority to US11/093,175 priority Critical patent/US20060078402A1/en
Assigned to TAPPEX THREAD INSERTS LIMITED reassignment TAPPEX THREAD INSERTS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARNSDALE, TIMOTHY JOHN RODERICK
Publication of US20060078402A1 publication Critical patent/US20060078402A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00Nuts or like thread-engaging members
    • F16B37/12Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122Threaded inserts, e.g. "rampa bolts"
    • F16B37/125Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
    • F16B37/127Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded and self-tapping

Definitions

  • the present invention relates to fasteners and in particular to fasteners, such as threaded inserts, arranged in use to be self-threaded into a parent material of a workpiece.
  • Threaded inserts are used to provide a strong wear resistant thread in a weak material such as a thermoplastic.
  • fasteners have an external thread that either cuts or thread forms into the weak material.
  • Such fasteners are known as ‘self tapping’ fasteners and it is to such fasteners that the invention has particular application.
  • a threaded fastener such as a screw or bolt to the threaded insert may commence. Once a clamp condition occurs between a joint formed between the threaded insert and the mating component, as the threaded fastener continues to rotate friction develops along a contact surface between the threaded insert and the threaded fastener. The friction increases as the tensile load in the joint increases.
  • the threaded insert may fail due to a number of mechanisms. If an air gap exists between the parent material and the threaded insert, the threaded insert may ‘jack out’. The threaded fastener may break or the thread formed in the threaded insert may be sheared. Also, the threaded insert may fail due to rotation caused by the threaded insert being partially jacked out and compressing the parent material if the material of the parent material is weaker than the material of the threaded insert thereby destroying the joint. The threaded insert may also fail by rotation where the thread formed by the threaded insert as it is inserted in the parent material becomes stripped and the threaded insert then continues to turn. This means both that no clamp load can then be created but also that it is very difficult to remove the threaded fastener as the threaded insert simply rotates with the parent material.
  • Self tapping inserts have the advantage that they are quick to install and provide high pull-out performance as the external thread is almost at right angles to the longitudinal axis of the insert (the angle being determined by the helix angle).
  • the low helix angle creates a low resistance to stripping by rotation.
  • a fastener comprising a generally cylindrical body about which is formed a thread, the fastener having a first end and a second end, in which a first end of the fastener is provided with a knurled surface.
  • the knurled surface is provided on a radially outwardly extending flange formed at the first end of the fastener.
  • the knurled surface comprises a radial knurl or a parallel knurl.
  • the knurled surface partially covers the first end of the fastener.
  • the knurled surface is formed in a ring on the first end of the fastener.
  • a leading edge of the external thread is formed with a cutting edge.
  • the fastener is formed with a plurality of longitudinal flutes equally spaced about a periphery of the generally cylindrical body. More preferably, a leading edge of each portion of the external thread is formed with a cutting edge.
  • FIG. 1 shows an end view of a first fastener in accordance with the present invention
  • FIG. 2 shows a side view, partly in section, of the fastener shown in FIG. 1 ;
  • FIG. 3 shows an end view of a second fastener in accordance with the present invention
  • FIG. 4 shows a side view, partly in section, of the fastener shown in FIG. 3 ;
  • FIG. 5 shows a side view, partly in section, of apparatus suitable for performing an application torque test.
  • the fastener 2 comprises a generally cylindrical body 10 formed with an internal thread 12 .
  • the fastener 2 comprises a radially outwardly extending flange 14 at a first end.
  • the fastener 2 may be formed from any suitable material, though may usefully be manufactured from brass or steel.
  • the internal thread 12 is adapted to receive a corresponding thread of a threaded fastener (not shown) in a conventional manner.
  • the first end of the fastener 2 forms the front bearing face of the fastener 2 .
  • the body 10 of the fastener 2 is provided with an external thread 16 .
  • the external thread 16 is formed with a set of three longitudinal flutes 18 equally spaced about the periphery of the body 10 .
  • Each of the flutes 18 is formed to have a depth substantially equal to the depth of the external thread 16 .
  • the leading edge (having regard to the direction of rotation of the fastener 2 during insertion into the parent material) of each portion of the external thread 16 is formed with a cutting edge. The cutting edge assists in cutting of a thread in the parent material in which the fastener 2 is inserted.
  • the radially outwardly extending flange 14 is provided with a knurled surface 20 .
  • the knurled surface takes the form of a ring or annulus located centrally on the upper surface of the radially outwardly extending flange 14 .
  • the knurled surface 20 may be a radial knurl (illustrated) or a parallel knurl. The knurled surface 20 need not cover completely the upper surface of the radially outwardly extending flange 14 to provide improved performance.
  • FIGS. 3 and 4 An alternative embodiment of a fastener 3 in accordance with the present invention is shown in FIGS. 3 and 4 .
  • the fastener 3 comprises a generally cylindrical body 11 formed with an internal thread 13 adapted to receive a corresponding thread of a threaded fastener (not shown) in a conventional manner.
  • the body 11 of the fastener 3 is provided with an external thread 17 .
  • the external thread 17 is formed with a set of three longitudinal flutes 19 equally spaced about the periphery of the body 11 .
  • Each of the flutes 19 is formed to have a depth substantially equal to the depth of the external thread 17 .
  • the leading edge (having regard to the direction of rotation of the fastener 3 during insertion into the parent material) of each portion of the external thread 17 is formed with a cutting edge. The cutting edge assists in cutting of a thread in the parent material in which the fastener 3 is inserted.
  • the knurled surface takes the form of a ring or annulus located centrally on the upper surface of the radially outwardly extending flange 14 .
  • the knurled surface 20 may be a radial knurl (illustrated) or a parallel knurl. The knurled surface 20 need not cover completely the upper surface of the radially outwardly extending flange 14 to provide improved performance.
  • the fastener 3 is not provided with a radially outwardly flange and a knurled surface 21 is instead formed on an end face of the body 11 of the fastener 3 .
  • Fasteners of the kind illustrated in FIGS. 1 and 2 and as illustrated in FIGS. 3 and 4 were subjected to a number of torque tests. Fasteners of the kind illustrated but without the knurled surface 20 were also subjected to the same torque tests.
  • One such test was an application torque test ( FIG. 5 ).
  • a fastener 2 is located in a parent material 30 .
  • a mating component 32 such as a plate is placed adjacent the parent material 30 .
  • a threaded fastener 34 such as a screw bolt, is then inserted through an opening in the mating component 32 and into the fastener 2 .
  • a washer 36 has been placed between a headed portion 38 of the threaded fastener 34 and the mating component 32 .
  • the threaded fastener 34 is then tightened as indicated by the headed arrows to clamp the mating component 32 to the parent material 30 .
  • the threaded fastener 34 is further tightened in increments until a desired loading is achieved or failure occurs.
  • the illustrated fasteners were found to withstand a much greater application of torque than those without the knurled surface 20 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)

Abstract

The present invention relates to fasteners and in particular to fasteners, such as threaded inserts, arranged in use to be self-threaded into a parent material of a workpiece. A threaded insert may fail due to a number of mechanisms, including I) due to rotation caused by the threaded insert being partially jacked out and compressing the parent material if the material of the parent material is weaker than the material of the threaded insert thereby destroying the joint or ii) by rotation where the thread formed by the threaded insert as it is inserted in the parent material becomes stripped and the threaded insert then continues to turn. A fastener (2,3) is disclosed comprising a generally cylindrical body (10,11) about which is formed a thread (16,17), the fastener having a first end and a second end, in which a first end of the fastener is provided with a knurled surface (20,21). This has the advantage that an insert having improved torque performance is provided.

Description

    FIELD OF THE INVENTION
  • The present invention relates to fasteners and in particular to fasteners, such as threaded inserts, arranged in use to be self-threaded into a parent material of a workpiece.
  • BACKGROUND TO THE INVENTION
  • Threaded inserts are used to provide a strong wear resistant thread in a weak material such as a thermoplastic.
  • It is known to provide inserts with an external knurl form around a shank portion thereof. The knurl form is used for installation of the fastener using heat, ultrasonics or simple press fit.
  • Other fasteners have an external thread that either cuts or thread forms into the weak material. Such fasteners are known as ‘self tapping’ fasteners and it is to such fasteners that the invention has particular application.
  • In use, once a threaded insert has been installed in the parent material and a mating component is placed in position, assembly of a threaded fastener, such as a screw or bolt to the threaded insert may commence. Once a clamp condition occurs between a joint formed between the threaded insert and the mating component, as the threaded fastener continues to rotate friction develops along a contact surface between the threaded insert and the threaded fastener. The friction increases as the tensile load in the joint increases.
  • The threaded insert may fail due to a number of mechanisms. If an air gap exists between the parent material and the threaded insert, the threaded insert may ‘jack out’. The threaded fastener may break or the thread formed in the threaded insert may be sheared. Also, the threaded insert may fail due to rotation caused by the threaded insert being partially jacked out and compressing the parent material if the material of the parent material is weaker than the material of the threaded insert thereby destroying the joint. The threaded insert may also fail by rotation where the thread formed by the threaded insert as it is inserted in the parent material becomes stripped and the threaded insert then continues to turn. This means both that no clamp load can then be created but also that it is very difficult to remove the threaded fastener as the threaded insert simply rotates with the parent material.
  • It is known to reduce this problem by the use of threaded inserts having a headed portion to provide a greater bearing surface to resist compression of the parent material. While this may prevent partial jacking out, known externally threaded inserts still fail due to rotation, in particular if the bearing surfaces of the threaded insert and the threaded fastener are smooth and near frictionless.
  • Self tapping inserts have the advantage that they are quick to install and provide high pull-out performance as the external thread is almost at right angles to the longitudinal axis of the insert (the angle being determined by the helix angle). The low helix angle creates a low resistance to stripping by rotation.
  • It is an advantage of the present invention that an insert having improved torque performance is provided for.
  • SUMMARY OF THE INVENTION
  • According to a first aspect of the present invention a fastener is provided comprising a generally cylindrical body about which is formed a thread, the fastener having a first end and a second end, in which a first end of the fastener is provided with a knurled surface.
  • Preferably, the knurled surface is provided on a radially outwardly extending flange formed at the first end of the fastener.
  • Preferably, the knurled surface comprises a radial knurl or a parallel knurl.
  • Preferably, the knurled surface partially covers the first end of the fastener.
  • Preferably, the knurled surface is formed in a ring on the first end of the fastener.
  • Preferably, a leading edge of the external thread is formed with a cutting edge.
  • Alternatively, the fastener is formed with a plurality of longitudinal flutes equally spaced about a periphery of the generally cylindrical body. More preferably, a leading edge of each portion of the external thread is formed with a cutting edge.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
  • FIG. 1 shows an end view of a first fastener in accordance with the present invention;
  • FIG. 2 shows a side view, partly in section, of the fastener shown in FIG. 1;
  • FIG. 3 shows an end view of a second fastener in accordance with the present invention;
  • FIG. 4 shows a side view, partly in section, of the fastener shown in FIG. 3; and
  • FIG. 5 shows a side view, partly in section, of apparatus suitable for performing an application torque test.
  • DESCRIPTION OF PREFERED EMBODIMENTS
  • Referring first to FIGS. 1 and 2 a fastener 2 is shown. The fastener 2 comprises a generally cylindrical body 10 formed with an internal thread 12. In the embodiment illustrated in FIGS. 1 and 2, the fastener 2 comprises a radially outwardly extending flange 14 at a first end. The fastener 2 may be formed from any suitable material, though may usefully be manufactured from brass or steel. The internal thread 12 is adapted to receive a corresponding thread of a threaded fastener (not shown) in a conventional manner.
  • In use, the first end of the fastener 2 forms the front bearing face of the fastener 2.
  • The body 10 of the fastener 2 is provided with an external thread 16. In the illustrated embodiment, the external thread 16 is formed with a set of three longitudinal flutes 18 equally spaced about the periphery of the body 10. Each of the flutes 18 is formed to have a depth substantially equal to the depth of the external thread 16. Advantageously, the leading edge (having regard to the direction of rotation of the fastener 2 during insertion into the parent material) of each portion of the external thread 16 is formed with a cutting edge. The cutting edge assists in cutting of a thread in the parent material in which the fastener 2 is inserted.
  • The radially outwardly extending flange 14 is provided with a knurled surface 20. In the illustrated embodiment, the knurled surface takes the form of a ring or annulus located centrally on the upper surface of the radially outwardly extending flange 14. By way of example, the knurled surface 20 may be a radial knurl (illustrated) or a parallel knurl. The knurled surface 20 need not cover completely the upper surface of the radially outwardly extending flange 14 to provide improved performance.
  • By using either a radial knurl or a parallel knurl formed into a ring on the top surface of the fastener 2 that can either completely or partially cover the front bearing face of the fastener 2 improved performance is achieved. As the clamping force increases, the knurl embeds itself into the parent material, thereby resisting the attempt of the fastener 2 to rotate.
  • An alternative embodiment of a fastener 3 in accordance with the present invention is shown in FIGS. 3 and 4.
  • The fastener 3 comprises a generally cylindrical body 11 formed with an internal thread 13 adapted to receive a corresponding thread of a threaded fastener (not shown) in a conventional manner.
  • The body 11 of the fastener 3 is provided with an external thread 17. In the illustrated embodiment, the external thread 17 is formed with a set of three longitudinal flutes 19 equally spaced about the periphery of the body 11. Each of the flutes 19 is formed to have a depth substantially equal to the depth of the external thread 17. Advantageously, the leading edge (having regard to the direction of rotation of the fastener 3 during insertion into the parent material) of each portion of the external thread 17 is formed with a cutting edge. The cutting edge assists in cutting of a thread in the parent material in which the fastener 3 is inserted.
  • In the illustrated embodiment, the knurled surface takes the form of a ring or annulus located centrally on the upper surface of the radially outwardly extending flange 14. By way of example, the knurled surface 20 may be a radial knurl (illustrated) or a parallel knurl. The knurled surface 20 need not cover completely the upper surface of the radially outwardly extending flange 14 to provide improved performance.
  • The fastener 3 is not provided with a radially outwardly flange and a knurled surface 21 is instead formed on an end face of the body 11 of the fastener 3.
  • By using either a radial knurl or a parallel knurl formed into a ring on the top surface of the fastener 2,3 that can either completely or partially cover the front bearing face of the fastener 2,3 improved performance is achieved. As the clamping force increases, the knurl embeds itself into the parent material, thereby resisting the attempt of the fastener 2,3 to rotate.
  • Fasteners of the kind illustrated in FIGS. 1 and 2 and as illustrated in FIGS. 3 and 4 were subjected to a number of torque tests. Fasteners of the kind illustrated but without the knurled surface 20 were also subjected to the same torque tests. One such test was an application torque test (FIG. 5). In this test a fastener 2 is located in a parent material 30. A mating component 32 such as a plate is placed adjacent the parent material 30. A threaded fastener 34, such as a screw bolt, is then inserted through an opening in the mating component 32 and into the fastener 2. In FIG. 3 a washer 36 has been placed between a headed portion 38 of the threaded fastener 34 and the mating component 32. The threaded fastener 34 is then tightened as indicated by the headed arrows to clamp the mating component 32 to the parent material 30. The threaded fastener 34 is further tightened in increments until a desired loading is achieved or failure occurs. The illustrated fasteners were found to withstand a much greater application of torque than those without the knurled surface 20.

Claims (8)

1. A fastener comprising a generally cylindrical body about which is formed a thread, the fastener having at first end and a second end, in which a first end of the fastener is provided with a knurled surface.
2. A fastener according to claim 1, in which the knurled surface is provided on a radially outwardly extending flange formed at the first end of the fastener.
3. A fastener according to claim 1, in which the knurled surface comprises a radial knurl or a parallel knurl.
4. A fastener according to claim 1, in which the knurled surface partially covers the first end of the fastener.
5. A fastener according to claim 1, in which the knurled surface is formed in a ring on the first end of the fastener.
6. A fastener according to claim 1, in which a leading edge of the external thread is formed with a cutting edge.
7. A fastener according to claim 1, in which the fastener is formed with a plurality of longitudinal flutes equally spaced about a periphery of the generally cylindrical body.
8. A fastener accordingly to claim 7 in which a leading edge of each portion of the external thread is formed with a cutting edge.
US11/093,175 2004-04-06 2005-03-29 Fastener Abandoned US20060078402A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/093,175 US20060078402A1 (en) 2004-04-06 2005-03-29 Fastener

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0407778.0 2004-04-06
GBGB0407778.0A GB0407778D0 (en) 2004-04-06 2004-04-06 Improvements in and relating to a fastener
US10/927,208 US7203989B2 (en) 2003-12-03 2004-08-26 Buffing ball made of foam material
US11/093,175 US20060078402A1 (en) 2004-04-06 2005-03-29 Fastener

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/927,208 Continuation-In-Part US7203989B2 (en) 2003-12-03 2004-08-26 Buffing ball made of foam material

Publications (1)

Publication Number Publication Date
US20060078402A1 true US20060078402A1 (en) 2006-04-13

Family

ID=36145520

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/093,175 Abandoned US20060078402A1 (en) 2004-04-06 2005-03-29 Fastener

Country Status (1)

Country Link
US (1) US20060078402A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008078343A1 (en) * 2006-12-22 2008-07-03 S.B.E. SOCIETÁ BULLONERIA EUROPEA S.p.A. Coupling element for connecting accessories to the chassis of vehicles
US20080310933A1 (en) * 2007-06-14 2008-12-18 Pratt & Whitney Rocketdyne, Inc. Locking Fastening Apparatus
US20100303581A1 (en) * 2009-06-01 2010-12-02 Steven Dean Eggers Plastic Product With Insert
US20130195568A1 (en) * 2010-09-13 2013-08-01 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Tool for machining a workpiece
CN104121058A (en) * 2014-07-10 2014-10-29 安徽江淮汽车股份有限公司 Engine lubrication system and oil duct seal assembly thereof
WO2021163763A1 (en) * 2020-02-19 2021-08-26 Floatpac Pty Ltd Modular raft system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2208532A (en) * 1938-10-15 1940-07-16 United Carr Fastener Corp Nut member
US2444145A (en) * 1943-05-24 1948-06-29 Rosan Joseph Insert and use of same
US3101763A (en) * 1959-06-01 1963-08-27 M & S Mfg Co Cleat mounting washer
US3177755A (en) * 1962-05-07 1965-04-13 Gen American Transporation Cor Wallboard screws
US3281173A (en) * 1965-01-08 1966-10-25 Rosan Eng Corp Insert having an integral locking collar
US3319690A (en) * 1964-01-02 1967-05-16 Rosan Eng Corp Top driven locking insert
US3405591A (en) * 1966-11-28 1968-10-15 Neuschotz Robert Threaded elements having deformable spacers
US4003287A (en) * 1975-07-08 1977-01-18 Yardley Products Corporation Insert of the self-tapping fluted type
US5064323A (en) * 1990-02-28 1991-11-12 Tappex Thread Inserts Limited Self-threading fastener
US20020102146A1 (en) * 2001-02-01 2002-08-01 General Dynamics Land Systems, Inc. Self-tapping insert, insert assembly, and method for mounting the insert

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2208532A (en) * 1938-10-15 1940-07-16 United Carr Fastener Corp Nut member
US2444145A (en) * 1943-05-24 1948-06-29 Rosan Joseph Insert and use of same
US3101763A (en) * 1959-06-01 1963-08-27 M & S Mfg Co Cleat mounting washer
US3177755A (en) * 1962-05-07 1965-04-13 Gen American Transporation Cor Wallboard screws
US3319690A (en) * 1964-01-02 1967-05-16 Rosan Eng Corp Top driven locking insert
US3281173A (en) * 1965-01-08 1966-10-25 Rosan Eng Corp Insert having an integral locking collar
US3405591A (en) * 1966-11-28 1968-10-15 Neuschotz Robert Threaded elements having deformable spacers
US4003287A (en) * 1975-07-08 1977-01-18 Yardley Products Corporation Insert of the self-tapping fluted type
US5064323A (en) * 1990-02-28 1991-11-12 Tappex Thread Inserts Limited Self-threading fastener
US20020102146A1 (en) * 2001-02-01 2002-08-01 General Dynamics Land Systems, Inc. Self-tapping insert, insert assembly, and method for mounting the insert

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008078343A1 (en) * 2006-12-22 2008-07-03 S.B.E. SOCIETÁ BULLONERIA EUROPEA S.p.A. Coupling element for connecting accessories to the chassis of vehicles
US20080310933A1 (en) * 2007-06-14 2008-12-18 Pratt & Whitney Rocketdyne, Inc. Locking Fastening Apparatus
US7922433B2 (en) * 2007-06-14 2011-04-12 Pratt & Whitney Rocketdyne, Inc. Locking fastening apparatus
US20100303581A1 (en) * 2009-06-01 2010-12-02 Steven Dean Eggers Plastic Product With Insert
US9028185B2 (en) * 2009-06-01 2015-05-12 Custom-Pak, Inc. Plastic product with insert
US9651080B2 (en) 2009-06-01 2017-05-16 Custom-Pak, Inc. Method for attaching plastic product with insert
US20130195568A1 (en) * 2010-09-13 2013-08-01 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Tool for machining a workpiece
US9272343B2 (en) * 2010-09-13 2016-03-01 Hartmetall-Werkzeugfabrik Paul Horn Gmbh Tool for machining a workpiece
CN104121058A (en) * 2014-07-10 2014-10-29 安徽江淮汽车股份有限公司 Engine lubrication system and oil duct seal assembly thereof
WO2021163763A1 (en) * 2020-02-19 2021-08-26 Floatpac Pty Ltd Modular raft system
GB2608913A (en) * 2020-02-19 2023-01-18 Floating Solar Australia Pty Ltd Modular raft system

Similar Documents

Publication Publication Date Title
EP2679835B1 (en) Threaded fastener
RU2272186C2 (en) Locking fastening device
AU2016303475B2 (en) Threaded fastener
US9322424B2 (en) Nut with lug flare
AU721145B2 (en) Clinch-type fastener member
TWI268826B (en) Tapping assist fastening element and method
CN105358846B (en) Tightening member and fastening assembly
JP2009507334A (en) Inserts configured to be attached to elements for the installation and electrical connection of electrical coupling plugs
US5244323A (en) Self locking set screw
US20060078402A1 (en) Fastener
EP1584826B1 (en) Threaded insert with knurl
MX2010009345A (en) Hoop retaining ring.
JP2007092836A (en) Loosening prevention structure of screw
JPH10131976A (en) Rotary body fixing implement
EP1087152B1 (en) Shaft depressor for a slap yoke in a steering assembly
US11833648B2 (en) Functional unit with fastening element and fixing element
EP3830434A1 (en) Low axial force sealing system
EP3449139A1 (en) Anti-vibration thread form
JPH05253765A (en) Screwing device

Legal Events

Date Code Title Description
AS Assignment

Owner name: TAPPEX THREAD INSERTS LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BARNSDALE, TIMOTHY JOHN RODERICK;REEL/FRAME:017019/0190

Effective date: 20050928

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

点击 这是indexloc提供的php浏览器服务,不要输入任何密码和下载